soddy rutherford (7 risultati)

Hardcover. Condizione: Fine. 1st Edition. Xxxi, 654 Pp. Blue Cloth. Second Printing Stated. Fine, No Wear, No Marks.

Soft cover. Condizione: Very Good. 1st Edition. Xiii, 233 Pp + Catalog At End. Paperback Original. First Printing, Cover Price $1.65. Light Usage.

Hardcover. Condizione: Very Good. 1st Edition. Cloth Spine, Papered Boards. July - December 1908, 984 pages, diagrams, figures, 28 plates. Cancelled copy from "Sternwarte Berlin-Babelsberg". Frontcover partially faded, but altogether a very nice copy. Contains important articles by Ernest Rutherford and T.Royds on nuclear physics: Experiments with Radium Emanation. The volume of Emanation; The Spectrum of radium Emanation (with 2 plates); The Action of Radium Emanation upon Water. Also by F. Soddy: Attempts to detect the production of helium from the primary radio Elements; The Relation between Radium and Uranium;

(21,5 x 14 cm). XV S., SS. 289-472, 197-236/ XIX S., SS. 821-923, 417-436. Mit Abbildungen. Original-Broschuren. Erste Ausgabe. - Rutherfod und Soddy beschreiben hier die Trennung von reinem Thorium und ThX. Dabei stellten sie fest, dass die Aktivität des ThX um die Hälfte abnimmt und die des Thorium dagegen zunimmt. Ihre Ausführungen stellen den ersten Schritt hin zu einer mathematischen Beschreibung der Radioaktivität dar. - Einbände etwas angestaubt und mit sorgsam restaurierten Rücken. Vorderer Umschlag des zweiten Heftes mit hinterlegter Fehlstelle am oberen Rand (mit leichtem Textverlust). Insgesamt gut erhalten. - DSB 12, 25.

Hardcover. Condizione: Fine. RUTHERFORD, Ernest and H.T. Brooks. "Comparison of the Radiations from Radioactive Substances" AND Rutherford, with Frederick Soddy, "The Cause and Nature of Radioactivity: Part I" AND by Rutherford and Frederick Soddy, "The Cause and Nature of Radioactivity: Part II" in "The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science", London, Taylor and Francis, 1902, sixth series, volume IV, viii,782pp, 6 plates. Newly and very skillfully rebound in half-calf and marbled boards; raised bands, lack and red spine labels. There is some foxing in the corner of the first 30pp or so, and also to the last 20pp. The text is generally clean and bright and crisp; the binding of course is new. [++] RUTHERFORD, Ernest and H.T. Brooks. "Comparison of the radiations from Radioactive Substances" pp 1-23; AND Rutherford and Frederick Soddy, "The Cause and Nature of Radioactivity: Part I" pp 370-396; AND (by Rutherford and Frederick Soddy) "The Cause and Nature of Radioactivity: Part II" pp 569-585. [++] "By this time Rutherford had recognized the need for skilled chemical assistance in his radioactivity investigations and had secured the services of a young chemistry demonstrator at McGill, Frederick Soddy. Together they removed most of the activity from a thorium compound, calling the active matter thorium X; but they too found that the X product lost its activity and that the thorium recovered its original level in a few weeks. Had Becquerel's similar finding for uranium not been immediately at hand, they might have searched for errors in their work. In early 1902, however, they began to plot the activities as a function of time, seeing evidence of a fundamental relationship in the equality of the time for thorium X to decay to half value and thorium to double in activity. This work led directly to Rutherford's greatest achievement at McGill, for with Soddy he advanced the still-accepted explanation of radioactivity. Becquerel for several years had considered the phenomenon a form of long-lived phosphorescence, although by the first years of the twentieth century he spoke vaguely of a "molecular transformation." Crookes, in the British tradition of visualized mechanical models, had suggested a modified Maxwell demon sitting on each uranium atom and extracting the excess energy from faster-moving air molecules, this energy then appearing as uranium radiation. The Curies had considered several possibilities but inclined strongly toward the concept of an unknown ethereal radiation the existence of which is manifested only through its action on the heaviest elements, which then emit alpha, beta, and gamma rays as secondary radiations. Perhaps the most prescient idea was offered by Elster and Geitelthat the energy exhibited by radioactive substances comes not from external sources but from within the atoms themselvesbut it was left to Rutherford and Soddy to add quantitative evidence to such speculation. Their iconoclastic theory, variously called transformation, transmutation, and disintegration, first appeared in 1902 and was refined in the following year. Although alchemy had long been exorcised from scientific chemistry, they declared that "radioactivity is at once an atomic phenomenon and the accompaniment of a chemical change in which new kinds of matter are produced." The radioactive atoms decay, they argued, each decay signifying the transmutation of a parent into a daughter element, and each type of atom undergoing its transformation in a characteristic period. This insight set the course for their next several years of research, for the task was then to order all the known radioelements into decay series and to search for additional members of these families."--Complete Dictionary of Scientific Biography, online.

London, Macmillan, 1913-1914. Royal8vo. Bound in contemporary half calf with two black leather title label to spine with gilt lettering. Five raised bands. In "Nature", Vol. 92, September - February, 1913-1914. Library stamp of Christ Church College, Oxford on first page of index with their bookplate on front free endpaper and that of Dr Lee's Laboratory, Christ Church, on front paste-down. Minor wear to extremities, otherwise a very fine and clean copy. First printing of this important paper introducing for the very first time the concept of isotopes" how to designate chemically identical elements with different atomic weights. This is also the first uses the term 'isotope' in print. This work would later award him the Nobel Prize in Physics. "To be able to refer generically to these active and inactive elements with identical chemical properties, Soddy introduced the technical term "isotope" in 1913.10 While chemically inseparable, active isotopes were distinguishable by their radioactive properties, and all isotopes differed in atomic weight. Soddy suggested that the 1912 metaneon of J. J. Thomson be considered "a case of isotopic elements outside the radioactive sequences."11 Following Soddy, Aston announced a partial separation in 1913 on this very basis. The connection between chemical properties and the periodic table became increasingly clarified with concurrent developments in the physics and chemistry of the nuclear atom, from the chemical side. Soddy proposed the alpha-ray rule in 1911, the key to the first of two locks. Applying his general principle that the common elements are mixtures of chemically inseparable elements "differing step-wise by whole units of atomic weight" specifically to the case of the radioelements, Soddy recognized that the expulsion of an alpha particle would result in a lighter element chemically inseparable from those occupying the "next but one" position in the periodic table. The second lock to the displacement law involved the beta transitions." (DSB)A rather indignant Ernest Rutherford responded [In the second paper]: the nucleus has "resultant" positive charge, he said, and as he elaborated, Rutherford came tantalizingly close to postulating the proton" (Nature Website).

London, Taylor and Francis, 1902. 8vo. Bound in contemporary half calf with marbled boards and gilt lettering to spine. Two title labels in red and black with gilt lettering to spine and five rasied bands with gilt ornamentation. In "Philosophical Magazine and Journal of Science", Sixth Series, Vol. 4, 1902. Front hinge cracked, frontboard almost detached.L Library label pasted on to pasted down front free end-paper and library stamp to verso of title page. A very fine and clean copy. Pp. 370-96" Pp. 569-585. [Entire volume: (8), 732 pp. + 6 plates. First printing of Rutherford and Soddy's seminal paper on the nature of radioactivity, "the revolutionary theory that radio-activity is a by-product of the transmutation of one form of matter into another." (PMM 411). The theory "provided the break with the past that was clearly needed [.] In this great theory of radioactivity which these young men sprung on the learned, timid, rather unbelieving, and, as yet, unquantized world of physics of 1902 and 1903, they unabashedly but forward the idea that some atomic species are subject to spontaneous transmutation." (PAIS, Inward Bound).They both were awarded the Nobel Prize in Physics for their work within radioactivity. Rutherford and Soddy introduced the expression "atomic energy" in this paper, "not just for the energy released by a radioactive element, but much more generally for the energy locked in any atom" (Brown et al., Twentieth Century Physics, I, p. 63)."By this time Rutherford had recognized the need for skilled chemical assistance in his radioactivity investigations and had secured the services of a young chemistry demonstrator at McGill, Frederick Soddy. Together they removed most of the activity from a thorium compound, calling the active matter thorium X" but they too found that the X product lost its activity and that the thorium recovered its original level in a few weeks. Had Becquerel's similar finding for uranium not been immediately at hand, they might have searched for errors in their work. In early 1902, however, they began to plot the activities as a function of time, seeing evidence of a fundamental relationship in the equality of the time for thorium X to decay to half value and thorium to double in activity.This work led directly to Rutherford's greatest achievement at McGill, for with Soddy he advanced the still-accepted explanation of radioactivity. Their iconoclastic theory, variously called transformation, transmutation, and disintegration, first appeared in 1902 and was refined in the following year. Although alchemy had long been exorcised from scientific chemistry, they declared that "radioactivity is at once an atomic phenomenon and the accompaniment of a chemical change in which new kinds of matter are produced." The radioactive atoms decay, they argued, each decay signifying the transmutation of a parent into a daughter element, and each type of atom undergoing its transformation in a characteristic period. This insight set the course for their next several years of research, for the task was then to order all the known radioelements into decay series and to search for additional members of these families." (DSB)The volume contains several other important papers by contemporary phycicians.